If I want to take the internal signal of my keyboard, funnel info via midi through a mixer and then via a mixer into my computer (via midi) (which subsequently goes through my stereo system) in order to boost the signal, what sort of model should I get? Is this a practical solution to the fact that the sounds that come through my computer from my piano are three times as soft as everything else connected to my stereo (not to mention the fact that I have a great deal of background noise at the volume I need to set my amplifer to) Thanks for any advice.